Coldcard Hack May Drive More Secure Bitcoin Self-Custody, Swan CEO Says

The hack of Coldcard hardware wallets could become a turning point for stronger security in Bitcoin self-custody, CoinDesk reported on August 5.

Cory Klippsten, chief executive officer of Swan Bitcoin, said the breach had prompted Bitcoin holders to reexamine their self-custody arrangements.

The incident was caused by a vulnerability in seed phrase generation at Coldcard, leading to the theft of more than 1,600 Bitcoin. About 90% of the stolen Bitcoin had not been moved as of a week after the attack.

Klippsten said his team stopped all other work and reached out to customers directly. Swan also offered support to anyone who needed help, even if they were not customers.

Users are not giving up on self-custody altogether, Klippsten said. Instead, they are exploring ways to strengthen security, including moving to Swan Vault, a collaborative multisignature service designed so assets cannot be accessed through a single device. He described that as an upgrade to a safer form of self-custody rather than an abandonment of it.

Klippsten added that it was unfortunate many users lost assets despite following storage practices recommended by the industry. Still, he said Bitcoin is an asset that absorbs shocks and grows stronger, and that this incident could ultimately help advance self-custody security.